Electronic device with wrapped display

ABSTRACT

An electronic device may have a hollow display cover structure. The hollow display cover structure may be formed from a structure having an inner surface. The structure may be an elongated member having a longitudinal axis. A material such as sapphire, other crystalline materials, or other transparent materials may be used in forming the hollow display cover structure. A flexible display layer such as an organic light-emitting diode display layer or other flexible display structure may be wrapped around the longitudinal axis to cover the interior surface of the hollow display cover structure. The electronic device may have a touch sensor, accelerometer, gyroscope, and other sensors for gathering input such as user input. The electronic device may use one or more sensors to gather information on rotational motion of the device and can display content on the flexible display layer accordingly.

BACKGROUND

This relates to electronic devices, and more particularly, to electronicdevices with displays.

Electronic devices such as computers, media players, and cellulartelephones typically contain displays. For example, an electronic devicemay have a front surface on which a display is mounted. Conventionaldisplay configurations such as these may be satisfactory in certainsituations, but can be unnecessarily limiting.

It would therefore be desirable to provide electronic devices withimproved displays.

SUMMARY

An electronic device may have a hollow display cover structure. Thehollow display cover structure may be formed from an elongated memberhaving an inner surface. The hollow display cover structure may have theshape of a hollow cylinder, a hollow tube with an oval, triangular, orrectangular cross-sectional shape, or other hollow shapes. A materialsuch as sapphire, other crystalline materials, or other transparentmaterials may be used in forming the hollow display cover structure. Endcaps may be attached to opposing ends of the hollow display coverstructure.

The elongated display cover structure may have a longitudinal axis. Aflexible display layer such as an organic light-emitting diode displaylayer or other flexible display structure may be wrapped around thelongitudinal axis to cover the interior surface of the hollow displaycover structure. The flexible display layer may have edges that abutwithout overlapping, may have overlapping edges, or may have edges thatprotrude through an opening in a support structure along a seam.

The electronic device may have a touch sensor, accelerometer, gyroscope,and other sensors for gathering input such as user input. The electronicdevice may, for example, use one or more sensors to gather informationon rotational motion of the device about the longitudinal axis, tiltevents, and other motion of the electronic device. In response todetection of these device motions, the electronic device can displaycontent on the flexible display layer.

The device may display content that moves or that remains at a fixedlocation on the surface of the flexible display layer. For example, theelectronic device may display pages of content on the display layer inresponse to tilt events or other motions of the device. The electronicdevice may also adjust scrolling activity and other on-screen contentmotions based on detected device rotation and other measured movement ofthe device. If desired, content can be displayed in synchronization withthe rotation of the electronic device about the longitudinal axis sothat the displayed content remains at a fixed location relative to auser. Content may be simultaneously displayed at a fixed location on thesurface of the display. In response to detection of a vertical deviceorientation in which the longitudinal axis is vertical, the device mayautomatically scroll content on the display around the longitudinalaxis.

Further features of the invention, its nature and various advantageswill be more apparent from the accompanying drawings and the followingdetailed description of the preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram of a system including an electronic device with acontinuously wrapped display in accordance with an embodiment of thepresent invention.

FIG. 2 is a schematic diagram of an electronic device of the type shownin FIG. 1 in accordance with an embodiment of the present invention.

FIG. 3 is a diagram of illustrative software that may be implemented oncontrol circuitry of the type shown in FIG. 2 in accordance with anembodiment of the present invention.

FIG. 4 is a perspective view of a transparent housing structures beinggrown from a molten material by pulling a seed crystal verticallyupwards in accordance with an embodiment of the present invention.

FIG. 5 is a perspective view of an illustrative hollow transparenthousing structure and a polishing tool of the type that may be used topolish an interior surface of the housing structure in accordance withan embodiment of the present invention.

FIG. 6 is a perspective view of an illustrative hollow transparenthousing structure and a belt-based polishing tool of the type that maybe used to polish an interior surface of the housing structure inaccordance with an embodiment of the present invention.

FIG. 7 is an exploded perspective view of a device with a continuousdisplay in accordance with an embodiment of the present invention.

FIG. 8 is a cross-sectional side view of an illustrative device with acontinuous display and two end cap structures in accordance with anembodiment of the present invention.

FIG. 9 is a cross-sectional side view of an illustrative flexibledisplay that includes an associated touch sensor array in accordancewith an embodiment of the present invention.

FIG. 10 is a cross-sectional end view of a flexible display of the typeshown in FIG. 9 showing how ends of the display may be oriented to abutone another in accordance with an embodiment of the present invention.

FIG. 11 is a cross-sectional view of two opposing ends of a flexibledisplay in a device with a continuously wrapped display showing howportions of the flexible display ends may overlap each other inaccordance with an embodiment of the present invention.

FIG. 12 is a cross-sectional end view of a flexible display that hasbeen wrapped around and into a support structure along a seam inaccordance with an embodiment of the present invention.

FIG. 13 is a cross-sectional end view of a device with a continuouslywrapped display showing how a seam region between opposing ends of thewrapped display may be covered using a strip of opaque masking materialon an interior surface of an elongated hollow transparent housing memberin accordance with an embodiment of the present invention.

FIG. 14 is a perspective view of an illustrative cylindrical transparenthousing structure in accordance with an embodiment of the presentinvention.

FIG. 15 is a perspective view the cylindrical transparent housingstructure of FIG. 14 that has been provided with a ring of opaquemasking material around each end in accordance with an embodiment of thepresent invention.

FIG. 16 is a perspective view of an illustrative electronic device witha rounded rectangular cross-section in accordance with an embodiment ofthe present invention.

FIG. 17 is a perspective view of an illustrative electronic device witha triangular cross-section in accordance with an embodiment of thepresent invention.

FIG. 18 is a perspective view of an illustrative electronic device witha rectangular cross-section in accordance with an embodiment of thepresent invention.

FIG. 19 is a perspective view of an illustrative electronic device witha continuously wrapped display that is being rotated during use whilemeasurements of device orientation and motion are being made inaccordance with an embodiment of the present invention.

FIG. 20 is a perspective view of an illustrative electronic device witha continuously wrapped display that has been placed on one of its endsand that is displaying horizontally scrolled content automatically inresponse to detection of a vertical device orientation in accordancewith an embodiment of the present invention.

FIG. 21 is a cross-sectional side view of an illustrative electronicdevice with a continuously wrapped display that is being rotated by auser while content such as static and moving content is displayed on thedisplay in accordance with an embodiment of the present invention.

FIG. 22 is a diagram showing content of the type that may be displayedon a continuously wrapped display such as scrolling game content inaccordance with an embodiment of the present invention.

FIG. 23 is a diagram showing content of the type that may be displayedon a continuously wrapped display such as scrolling text in accordancewith an embodiment of the present invention.

FIG. 24 is a side view of an illustrative electronic device with acontinuously wrapped display that is being tilted forwards and back by auser to control display of content on the display in accordance with anembodiment of the present invention.

FIG. 25 is a flow chart of illustrative steps involved in displayingcontent on an electronic device with a continuously wrapped display andcontrolling the display of the content using tilting operations or otheruser input in accordance with an embodiment of the present invention.

FIG. 26 is a flow chart of illustrative steps involved in displayingcontent on an electronic device with a wrapped display based on deviceorientation or other input in accordance with an embodiment of thepresent invention.

FIG. 27 is a perspective view of an illustrative electronic device withdisplay such as a wrapped display in which a user is supplying a touchcommand to a hidden portion of the display while the device isdisplaying corresponding content on a visible portion of the display inaccordance with an embodiment of the present invention.

FIG. 28 is a flow chart of illustrative steps involved in gatheringsensor input and taking appropriate actions based on the sensor input inan electronic device with a wrapped display in accordance with anembodiment of the present invention.

DETAILED DESCRIPTION

An illustrative system that includes an electronic device with a wrappeddisplay is shown in FIG. 1. As shown in FIG. 1, device 10 may have adisplay such as display 12 that is continuously wrapped around the bodyof device 10. Displays such as display 12 may be formed using liquidcrystal display (LCD) technology, a light-emitting display such as anorganic light-emitting diode display, an electrophoretic display, anelectrowetting display, a plasma display, or other suitable types ofdisplay technology.

In the example of FIG. 1, the housing of device 10 has an elongatedshape with an oval cross-sectional shape. This is merely illustrative.Other types of housings may be used for device 10 if desired.

As shown in FIG. 1, electronic device 10 may be coupled to an accessorysuch as headset 14 by plugging plug 16 of accessory 14 into jack 18 ofelectronic device 10.

Electronic device 10 may be a computer such as a desktop computer,tablet computer, or laptop computer. Device 10 may also be a handheldelectronic device such as a cellular telephone or media player, a tabletdevice, other portable electronic devices, or other electronicequipment. Headset 14 may have speakers 20 and controller 22. Controller22 may have buttons and may therefore sometimes be referred to as abutton controller or button controller assembly. Button controller 22and speakers 20 may be coupled to device 10 using cable 24. Cable 24 maycontain multiple wires. Button controller 22 may, if desired, include amicrophone. The microphone may be used by a user of device 10 andheadset 12 during a telephone call (e.g., to pick up the user's voice).

Device 10 may have opposing end faces such as end faces 28. End faces 28may be associated with plastic cap structures or other types of housingstructures. Device 10 may have input-output components such as buttonsand switches 26 that are mounted to end face structures 28. Components26 may also include status indicator lights, microphone ports, speakerports, connector ports in addition to audio jack port 18, sensors suchas an ambient light sensor and proximity sensor, and other electricalcomponents.

A schematic diagram showing illustrative circuitry that may be includedin device 10 is shown in FIG. 2. As shown in FIG. 2, electronic device10 may include control circuitry such as storage and processingcircuitry 29. Storage and processing circuitry 29 may include storagesuch as hard disk drive storage, nonvolatile memory (e.g., flash memoryor other electrically-programmable-read-only memory configured to form asolid state drive), volatile memory (e.g., static or dynamicrandom-access-memory), etc. Processing circuitry in storage andprocessing circuitry 29 may be used to control the operation of device10. The processing circuitry may be based on one or moremicroprocessors, microcontrollers, digital signal processors, basebandprocessors, power management units, audio codec chips, applicationspecific integrated circuits, etc.

Input-output devices 32 may include sensors such as sensors 34. Sensors34 may include sensors such as ambient light sensors, touch sensors,accelerometers, and proximity sensors, touch screen sensor arrays (e.g.,capacitive touch sensors, touch sensors based on resistive touch sensortechnology, acoustic touch technology, light-based touch technology, orother touch sensors), and other sensors.

Input-output devices may also include devices 36 such as audioinput-output devices (e.g., microphones and speakers), device such asbuttons, joysticks, click wheels, scrolling wheels, touch pads, keypads, keyboards, tone generators, vibrators, cameras, status indicatorssuch as light-emitting diodes, etc. Devices 36 may also include one ormore displays such as display 12 of FIG. 1.

Communications circuitry 38 may include wired data port circuitry andwireless communications circuitry. The wireless communications circuitrymay include radio-frequency (RF) transceiver circuitry formed from oneor more integrated circuits, power amplifier circuitry, low-noise inputamplifiers, passive RF components, one or more antennas, and othercircuitry for handling RF wireless signals. Wireless signals can also besent using light (e.g., using infrared communications).

Electronic device 10 may interact with external equipment. For example,electronic device 10 may send data to external equipment 44 and mayreceive data from external equipment 44. External equipment 44 mayinclude a wireless local area network that communicates wirelessly withdevice 10 using communications circuitry 38 in device 10, may be wirednetwork equipment to which device 10 is attached with a cable, may be apeer device that is coupled to device 10 through a wired or wirelessconnection, or may be other equipment that sends and/or receives signalsfrom device 10.

Electronic device 10 may also interact with equipment such asaccessories 42 using a wired path and/or wireless path. For example,accessories 42 may include a headset with an audio plug that isconfigured to mate with an audio jack in device 10. Accessories 42 mayalso include microphones, speakers, and other audio accessories, videoaccessories, televisions, computer monitors, charging stations, displayequipment, embedded system equipment such as equipment in an automobile,and other external electronic equipment. Analog and/or digitalcommunications may be used in communicating between device 10 andaccessories 12.

Device 10 may use software for implementing functions that displayinformation on display 12 and other device functions. The software maybe implemented on control circuitry such as storage and processingcircuitry 29 of FIG. 2. As shown in FIG. 3, software that may beimplemented on device 10 may include operating system 46 andapplications 48. Applications 48 may include productivity applications50 such as word processing applications, document managementapplications, applications for viewing and editing Portable DocumentFormat files, applications for viewing presentations, and spreadsheetapplications. Applications 48 may also include media playbackapplications such as video applications, electronic book readers, andapplications for playing audio files (e.g., with the simultaneousdisplay of cover art, lyrics, and other associated information).Applications 48 may include games 54, video and photo editingapplications 56, and other applications 58. Games 54 may include gameswith static image content such as word games and moving images (video)such as action games. Editing applications 56 may be used to editvideos, to edit digital photographs, and to edit other digital imagingdata. Applications 58 may include applications for displaying stockprices and other financial data, applications for displaying reviews,applications for displaying travel information, applications fordisplaying weather information, and other applications.

When running application and operating system software such asapplications 48 and operating system 46, device 10 may gather user inputfrom a touch screen, keyboard, touch pad, voice recognition function, orother user input resources and may provide a user of device 10 withaudio output using speakers or other audio equipment. Visible output maybe displayed for the user with display 12 using applications 48 and/oroperating system 46. The visible output that is displayed for the usermay include static content and or moving content. Displayed content mayinclude still and/or moving images such as digital image data, video,graphics, text, game output, etc.

In some applications, content may be displayed on display 12 in awrapped fashion (i.e., using an approach that takes advantage of thewrapped display shape of display 12). For example, content may bedisplayed on display 12 that circulates around display 12 continuously,as with a scrolling stock ticker. As another example, game content maybe displayed for a user that continually updates in response torotational motion of device 10 as a user rotates display 12 (and device10).

Display 12 may, if desired, have a display cover structure. The displaycover structure may be formed from a transparent material with a hollowshape. As an example, the display cover structure may have the shape ofan elongated hollow structure such as a hollow cylinder or a hollow tubewith a non-circular cross-sectional shape. A flexible display layer maybe mounted on the inner surface of the hollow display cover structure.For example, a flexible display layer may be attached to an innersurface of a hollow display cover structure using adhesive.

A display cover structure may be formed from a transparent material suchas clear glass (e.g., borosilicate glass, fused silica, etc.),transparent plastic, clear ceramic (e.g., aluminum oxynitride), etc.With one illustrative arrangement, which may sometimes be describedherein as an example, display cover structures may be formed from atransparent crystalline material such as sapphire (aluminum oxide),zirconium dioxide, or other materials that are clear and hard. Anadvantage of materials of this type is that they may exhibit elevatedhardness values (e.g., values of 9 Mohs, 7 Mohs or above, 8 Mohs orabove, or other values above 6 Mohs, which is typical for borosilicateglass).

Sapphire display cover structures may be grown as single crystals bypulling a boule of sapphire from a melt. This type of arrangement isshown in FIG. 4. Crucible 72 may be filled with alumina powder, which israised to a sufficient temperature to form a molten liquid (melt 62).Single-crystal seed 64 may then be pulled upwards in direction 68. Asseed crystal 64 moves upwards, the material in melt 62 cools andcrystallizes, forming a growing sapphire boule such as boule 65. Boule65 may form display cover structures for display 12.

The shape of the seed crystal that is used in growing sapphire structure66 may influence the shape of sapphire structure 66. For example, if theseed crystal has an opening, the resulting sapphire structure that isgrown may be hollow. In the illustrative configuration of FIG. 4, seed64 has the shape of a hollow circular ring having an opening such asopening 70. In general, seed crystals such as seed crystal 64 may haveany suitable shape (e.g., rings with one opening, rings with more thanone opening, solid shapes with no openings, etc.). Moreover, other typesof crystal growth techniques may be used for growing sapphire structuresif desired. The illustrative seed crystal arrangement of FIG. 4 ismerely illustrative.

Following formation of a hollow sapphire structure such as structure 66of FIG. 4, structures 66 may be divided into individual device-sizedpieces. The interior surfaces of structures 66 may be sufficientlysmooth for use without additional machining. If desired, additionalmachining operations may be used to smooth interior surfaces. As shownin FIG. 5, for example, interior surface 78 of display cover structure74 may be machined using rotating tool 76 (e.g., by inserting tool 76within the hollow interior of structure 74 in direction 80 and movingtool 76 around the entire interior surface of structure 74). As shown inFIG. 6, a belt-based machining (grinding) tool such as tool 82 may beused to machine interior surface 78 of display cover structure 74 afterbeing inserted into the hollow interior of structure 74 in direction 80.

An exploded perspective view of an illustrative device with a wrappeddisplay is shown in FIG. 7. As shown in FIG. 7, device 10 may includehollow display cover structure 74. Device 10 may also include a flexibledisplay layer such as flexible display layer (flexible display) 86.Flexible display layer 86 may be wrapped 360° around longitudinal axis94 (i.e., display layer 86 may be wrapped around axis 94 sufficiently tosurround axis 94). During assembly of layer 86 and display coverstructure 74 to form display 12, layer 86 may be attached to innersurface 78 of display cover structure 74 using optically clear adhesiveor other fastening mechanisms. Opposing edges of flexible display layer86 may be joined along seam 88.

Circuitry for device 10 such as storage and processing circuitry 29 andcircuitry associated with input-output devices 32 of FIG. 2 may beimplemented using components that are mounted within the interior offlexible display layer 86. For example, circuitry for device 10 may beimplemented using electrical components 92. Electrical components 92 mayinclude one or more integrated circuits, discrete components such asinductors, resistors, and capacitors, components such as switches,filters, power supply components, connectors, sensors, input-outputdevices, and other electronic devices.

Electrical components 92 may be mounted on a substrate such as substrate90. Substrate 90 may be a printed circuit or other dielectric supportstructure. For example, substrate 90 may be a flexible printed circuit(“flex circuit”) formed from a flexible sheet of polyimide or otherflexible polymer layer or may be formed from fiberglass-filled epoxy(e.g., FR4) or other rigid printed circuit material. If desired,substrate 90 may be formed from injection molded plastic, ceramic, orother dielectric structures.

Following assembly of display 12 by inserting flexible display layer 86in display cover structures 74, structures such as end cap structures 84may be attached to display 12 to form a completed housing for device 10.End cap structures 84 may be formed from plastic, glass, ceramic,crystalline materials such as sapphire, or other suitable materials. Endcaps 84 may be used in forming structures such as end faces 28 ofFIG. 1. Structures such as audio jack port 18 and components 26 may beformed on end caps 84.

As shown in FIG. 8, end caps 84 may be configured to have a dimension D2(e.g., a diameter or other lateral dimension perpendicular tolongitudinal axis 94) that is slightly larger than dimension D1 (e.g., adiameter or other lateral dimension perpendicular to longitudinal axis94). This type of arrangement may help protect the exterior surface ofdisplay 12 (i.e., the display cover structure from which display 12 isformed) from scratches. If desired, dimensions D1 and D2 may be equal ordimension D2 may be less than dimension D1. The configuration of FIG. 8in which dimension D2 is larger than dimension D1 to create a gapbetween display 12 and a surface on which device 10 is resting (e.g., agap of 0.05 to 2 mm or more than 0.2 mm) is merely illustrative.

Flexible display layer 86 may include multiple layers of material forforming structures such as a flexible display having an array of displaypixels and optional touch sensor structures for forming a touch sensorarray. An illustrative configuration for flexible display layer 86 isshown in FIG. 9. As shown in FIG. 9, flexible display layer 86 may havea substrate such as substrate 96. Substrate 96 may be formed from aflexible polymer (e.g., polyimide or other suitable material).Structures for emitting light such as display pixel structures 98 may beformed on substrate 96. Display pixel structures 98 may include organiclight-emitting diode pixels, pixels based on liquid crystal displaystructures, electrowetting display pixels, electrophoretic displaypixels, or pixels formed using other suitable display technologies. Acover layer such as layer 100 may, if desired, be formed over displaypixel layer 98. For example, a clear protected polymer film may beformed over the upper surface of display pixel layer 98 (e.g., a layerof sealant, etc.).

If desired, touch sensor structures may be incorporated into flexibledisplay layer 86. A capacitive touch sensor may, as an example, beformed from an array of capacitive touch sensor electrodes such aselectrodes 104 and 108. Electrodes 104 may include row-shaped strips ofa transparent conductive material such as indium tin oxide that runparallel to the X axis in FIG. 9. Electrodes 108 may run perpendicularto electrodes 104. For example, electrodes 108 may include column-shapedstrips of transparent conductive material such as indium tin oxide thatrun parallel to the Y axis in FIG. 9. Electrodes such as electrodes 104and 108 may be formed using other electrode shapes, if desired. The useof strip-shaped electrodes in the example of FIG. 9 is merelyillustrative.

Electrodes 104 and 108 may be formed on the opposing lower and uppersurfaces of substrate 106 or, if desired, may be formed on the samesurface of substrate 106 or other substrates (e.g., a cover layer, otherdisplay layers, etc.). Substrate 106 may be formed from a material suchas polyimide or other transparent flexible polymer. If desired, touchsensor arrays may be formed using other types of touch sensors. Forexample, touch sensor arrays for flexible display 86 may be formed fromresistive touch sensor structures, force-based touch sensor structures,light-based touch sensor structures, or other touch technologies. Theuse of capacitive touch sensor structures to form a touch sensor arrayfor flexible display layer 86 is merely illustrative. Touch sensorstructures may be attached to display layers such as layers 96, 98, and100 using adhesive such as optically clear adhesive 102 or othersuitable attachment mechanisms.

As shown in the end view of FIG. 10, flexible display layer 86 may bewrapped around longitudinal axis 94 to form a cylindrical shape suitablefor covering a cylindrical inner surface of a hollow display coverstructure. Flexible display layer 86 may, in general, be wrapped aroundaxis 94 to form a shape with a circular cross section, an oval crosssection, a triangular cross section, a rectangular cross section, arectangular cross section or other cross section with one, two, three,four, or more than four rounded edges, other polygonal cross sections,or other suitable shapes. As shown in FIG. 10, opposing edges 86A and86B of flexible display layer 86 may be configured to abut one anotherwithout overlapping along seam 88. As shown in the illustrativeconfiguration of FIG. 11, edges 86A and 86B may overlap along seam 88,if desired.

As shown in the cross-sectional end view of flexible display layer 86 ofFIG. 12, edges 86A and 86B of flexible display layer 86 may be flaredoutwardly so as not to overlap each other along seam 88. This allowssmall inactive edge portions of display layer 86 to be hidden from viewin the interior of device 10, thereby minimizing or eliminating exposedinactive display areas on the exterior of display 12.

Flexible display layer 86 may, if desired, be mounted on an internalsupport structure such as support structure 110 of FIG. 12 (using a seamconfiguration of the type shown in FIG. 10, 11, or 12 or other suitableseam configuration). Support structure 110 may be formed from plastic orother suitable materials. Flexible display layer 86 may be attached tosupport structure 110 using adhesive or the interface between layer 86and support structure 110 may be free of adhesive. A layer of foam orother biasing structure may be used to help push flexible display layer86 outwards against inner surface 78 of display cover structure (FIG. 7)and/or a layer of adhesive may be interposed between flexible displaylayer 86 and inner surface 78 to help attach flexible display layer 86to display cover structure 74.

FIG. 13 is a cross-sectional end view of display 12 in an illustrativeconfiguration in which flexible display layer 86 has been attached toinner surface 78 of display cover structure 74 using a layer of adhesivesuch as optically clear adhesive 112. As shown in FIG. 13, flexibledisplay layer 86 may have a seam such as seam 88 that is formed alongthe line where edges 86A and 86B of flexible display layer meet (in anoverlapping or non-overlapping configuration). If desired, seam 88 maybe hidden from view using an opaque structure such as opaque structure114. Opaque structure 114 may be formed from a strip of material such asmetal, plastic, ceramic, ink, paint, or other opaque materials. As anexample, structure 114 may be an opaque masking layer formed from alayer of black ink having a rectangular strip shape that extends alongthe length of seam 88.

FIG. 14 is a perspective view of display cover structure 74 in aconfiguration in which inner surface 78 is devoid of opaque maskingmaterial 114. As shown in the example of FIG. 15, circumferential endbands or other portions of inner surface 78 of display cover structure74 may be covered with opaque masking material in the shape of opaquerings 116 at longitudinally opposing ends of display cover structure 74.

FIG. 16 is a perspective view of illustrative structures for display 12in which elongated transparent display cover structure 74 and flexibledisplay layer 86 have been configured to form a display having anelongated shape with a rectangular cross section with rounded edges.

FIG. 17 is a perspective view of illustrative structures for display 12in which display cover structure 74 and flexible display layer 86 havebeen configured to form a display having an elongated shape with atriangular cross section.

In the illustrative configuration of FIG. 18, display cover structure 74and flexible display layer 86 have been configured to form a displayhaving an elongated shape with a rectangular cross section withperpendicular side walls.

FIG. 19 is a perspective view of display 12 in the process of displayingcontent 118 for a user of device 10. The user may be positioned, forexample, at viewer location 120 and may view display 12 in direction122. As the user is using device 10, the user may rotate device 10 aboutaxis 94. For example, while staying in a fixed viewing location such asposition 120, the user may rotate display 12 in counterclockwisedirection 126 about axis 94. At the same time as the user is rotatingdisplay 12 (and device 10) in a counterclockwise fashion, device 10 mayrotate content 118 (or some of content 118) on the surface of display 12in the opposite direction (i.e., in clockwise direction 124). Anaccelerometer, gyroscope, and/or other sensors in device 10 may be usedin monitoring the rotation and orientation of device 10 and display 12in real time. Content can be displayed in synchronization with therotation of display 12, if desired.

By rotating some of content 118 to counteract the rotation of display12, device 10 may maintain portions of content 118 stationary withrespect to viewer position 120 while other portions of content 118 areallowed to rotate with the display. For example, a game or othersoftware may be implemented on device 10 that contains a ball or otherobject such as object 118B. Object 118B may be moved relative to thesurface of display 12 by tilting and rotating display 12. Content 118Amay remain stationary on the surface of display 12 as the usermanipulates display 12.

As an example, content 118A may represent the walls of a maze in a gameand content 118B may represent a ball that moves relative to the wallsof the maze. As the user rotates display 12 in direction 126, walls 118Amay rotate in the same direction as display 12, as if walls 118A wereaffixed to the surface of display 12. While walls 118A are being rotatedin this way relative to viewer location 120, ball 118B may be displayedin a fixed location relative to viewer location 120 (i.e., the locationof ball 118B may be moved on display 12 in synchronization with theuser's rotation of display 12 so that ball 118B is maintained at a fixedlocation with respect to the user).

Ball 118B may be located on an upper surface of display 12 in theorientation of FIG. 19. Movement of ball 118B relative to maze walls118A (i.e., movement back and forth parallel to longitudinal axis 94 totraverse maze 118A) may be made using an accelerometer or other sensorin device 10 to monitor tilting of device 10 relative to the surface ofthe Earth. Because display 12 is wrapped around device 10, a user canrotate display 12 and device 10 indefinitely and device 10 cancontinually update the displayed content on display 12. This allows theuser to continue playing the game indefinitely without running out ofdisplay surface real estate. Any of applications 48 or operating system46 of FIG. 3 may display content 118 on display 12 in this way, ifdesired (e.g., map applications, navigation applications, musicapplications that display music scores and other information, videoediting applications that display videos on a timeline, etc.). The useof a game application to illustrate the use of a wrapped display ondevice 10 is merely illustrative.

As shown in FIG. 20, device 10 may, if desired be placed in an end-downposition on a surface such as surface 128. In this type of arrangement,the entire surface of display 12 may be exposed. Device 10 may displaycontent such as content 118 in a static fashion (i.e., in a stationaryposition relative to the stationary surface of display 12) or may movecontent 118 on the surface of display 12. For example, device 10 mayautomatically scroll content 118 around the surface of display 12 indirection 130 (e.g., in a “stock ticker” mode) in response to data froman accelerometer or other sensor that indicates that device 10 has beenplaced in an orientation in which longitudinal axis 94 is orientedvertically. Information that may be displayed in this way includescontent associated with games, video, text (e.g., stock quotes, sportsscores, news headlines, etc.).

FIG. 21 is a side view of device 10 showing how wrapped display 12 maybe viewed in direction 122 by a user at viewer position 120 whilerotating device 10 and display 12 in direction 126. The surface ofdisplay 12 may be considered to be made up of four contiguous areas—afirst area extending from A to B, a second area extending from B to C, athird area extending from C to D, and a forth area extending from D toA. Device 10 may use an accelerometer, gyroscope, or other sensors indetermining the orientation of device 10 and display 12 relative to theEarth (surface 130). Using this information, device 10 can displayinformation on display 14 in real time that is based on the user'spositioning of device 10 relative to the Earth and/or other appropriateinputs (e.g., time, date, content, etc.).

FIG. 22 shows how a display such as display 12 of FIG. 21 may displaycontent 118 that includes static content 118A (e.g., lines in a mazethat are in a fixed position relative to the surface of display 12) andmoving content 118B (e.g., a moving ball or other moving content thatmay or may not be positioned so as to remain at a fixed locationrelative to a user).

As shown in FIG. 23, content 118 may include text 118T and graphics118G. As a user rotates display 12, content 118 may be updated. Forexample, device 10 may update the portion of display 12 that is notcurrently visible to the user with fresh content, so that the content ondisplay 12 appears to be continuous (unending) and so that there are novisible artifacts associated with the updating process. This type ofarrangement may be used to allow a user to read a book or other longdocument without turning pages. Media files and other information mayalso be displayed in this way.

As the user continuously rotates device 10 about axis 94 (FIG. 21),content 118 can be updated in real time. Content 118 may be displayed ata fixed location on display 12, so that content 118 moves as display 12is rotated. If desired, content 118 may rotated about axis 94 insynchronization with the rotation of display 12. For example, an objectmay be displayed at a position that moves along the surface of display14 in synchronization with the rotation of display 12 about axis 94.Content can be rotated about axis 94 at a speed that maintains theobject at a fixed position relative to a user.

FIG. 24 is a side view of an illustrative configuration that may be usedfor device 10 in which display 12 has a rectangular cross-sectionalshape with rounded edges. This type of configuration may be used, forexample, to provide display 12 with front and rear surfaces (F and R inFIG. 24) that are substantially planar. Surfaces F and R may be used,for example, to read text and view other content. An accelerometer orother sensor may be used by device 10 to monitor the orientation ofdevice 10 relative to the Earth (surface 130). Initially, a user may beholding device 10 so that front surface F and rear surface R arehorizontal and lie along axis 132 in the X-Y plane. The user may controlthe display of information on display 12 by tilting device 10 (e.g., byrotation from a nominal horizontal position), by using touch gestures,using buttons, using voice commands, or using other user input.

As an example, the user may tilt device 10 so that device 10 is alignedalong axis 134 at an angle θ with respect to axis 132 and the X-Y plane.The tilt magnitude (i.e., the magnitude of angle θ) or other tilt(rotation) data such as angular motion data associated with placingdevice 10 at angle θ may be used in flipping pages of text on front faceF, may be used in determining whether to display information on front For rear R of display 12, may be used in providing motion to content 118on display 12 (see, e.g., ball 118B of FIG. 19), or may otherwise beused in controlling the display of information on display 12. Forexample, a user may be reading a document with pages of content 118. Tomove forward or backwards through content 118 (i.e., to turn pages), theuser may flip (invert) device 10 so that front face F is orienteddownwards and rear face R is faced upwards (i.e., to move device into aconfiguration in which the magnitude of angle θ is 180°).

FIG. 25 is a flow chart of illustrative steps involved in displayingcontent 118 on display 12 based on information such as orientation(faced up or down) or other tilt angle input. At step 136, device 10 maydisplay content 118 on display 12. Device 10 may, for example, displaycontent 118 on front face F and optionally on rear face R and thesidewall surfaces of wrapped display 12 of FIG. 24 (or other suitabledisplay with front and rear surfaces)

During the operations of step 136, device 10 may use an accelerometer orother sensor to determine the orientation of device 10 relative to Earth130 (e.g., to measure angle θ or to gather other tilt data). When theuser makes a forward tilt motion (e.g., by exceeding a predeterminedtilt angle or forward-tilting angular velocity), device 10 may detect aforward tilt event. When the user makes a backwards tilt motion (e.g.,by exceeding a predetermined negative tilt angle or backwards-tiltingangular velocity), device 10 may detect a backward tilt event. Device 10may then display content 118 on display 12 based on the type of tiltevent that is detected (step 138). For example, device 10 may scrollcontent 118 up or down depending on tilt direction, may flip throughpages of content based on tilt direction, may control the movement ofobjects on display 12 based on tilt (rotational) data, or may make othersuitable adjustments to content 118 on display 12 in real time. Inresponse to detection of the cessation of tilting (i.e., in response tothe return of device 10 to a tilt angle less than a predetermined tiltangle or the restoration of device 10 to a suitable angular velocitychange), device 10 can halt the scrolling of content 118 on display 12,may change the speed at which content 118 is scrolled on display 12, ormay otherwise adjust the way in which scrolled content 118 is displayedon display 12 (step 140).

FIG. 26 is a flow chart of illustrative steps involved in updating thedisplay of pages (screens) of content on display 13 in response to tiltevents (e.g., full device inversions or other tilting data). At step142, device 10 may display a new page of content on display 12. Forexample, device 10 may display a page of text from a book, a screenfilled with graphics or video, or other screen of content. During theoperations of step 142, device 10 may use an accelerometer, gyroscope,or other sensor to gather tilt data (angle, angular motion, etc.). Asthe user tilts device 10 by 180° (e.g., to invert device 10 so thatfront face F of display 12 faces downwards), device 10 can detect thisevent using the accelerometer, gyroscope, or other sensor (step 144) andcan take suitable actions in response (e.g., by flipping to a new page,screen of graphics, or other content at step 142). The user may tiltdevice 10 so that device 10 rotates around axis 94 or may tile device 10perpendicular to axis 94 or in other directions.

FIG. 27 is a perspective view of device 10 (e.g., a device such asdevice 10 of FIG. 1 having features such as those of device 10 of FIG.21 and/or FIG. 24 and the other FIGS.) in a configuration in which auser's finger 146 or other external object is being moved along rearsurface R of display 12 while suitable actions are being taken inresponse by device 10. A user may, for example, move finger 146 indirection 148 across lower surface R. Display 12 may include a touchsensor array that detects the movement of finger 146 (e.g., asingle-finger or, if desired, multi-finger touch gesture). In response,device 10 may move content 118 on front surface F of display 12. Forexample, device 10 may move object 150 in direction 152 (parallel todirection 148). Device 10 may also take other suitable actions such asmoving forwards or backwards through content, flipping pages of content,advancing or moving backwards through content screens, scrolling throughcontent, changing a content scrolling direction or speed, etc.

FIG. 28 is a flow chart of illustrative steps involved in displayingcontent 118 (moving and/or static) on wrapped display 12 in response tosensor input, time data, date data, other external data, user input, orother input.

At step 154, a user may manipulate device 10. For example, a user maytilt device 10, may rotate device 10 to exceed a predetermined angularvelocity or acceleration, may supply touch input (e.g., touch gestures),may press buttons to supply user input, may issue voice commands, or mayotherwise take actions to supply input to device 10.

During the operations of step 156, device 10 may gather correspondinginput data. Device 10 may, for example, use an accelerometer, gyroscope,ambient light sensor, camera, microphone, touch sensor, clock or otherinput device to gather input as the user is supplying input bymanipulating device 10.

At step 158, device 10 may display content 118 on display 12 based onthe gathered input of step 156. For example, device 10 may move anobject on display 12, may hold certain objects fixed (e.g., to allow theobjects to rotate as display 12 is rotated), may flip pages or otherscreens of content, may scroll content or adjust scroll speed or pageflip speed, may change the volume of media playback, may adjust screencolors, may take actions in a productivity application (e.g., by makingan edit or taking other actions in a word processor, document editor, orother content editing program), may take actions in a game (e.g., tomove graphic elements), may take actions in connection with operatingsystem functions (e.g., to delete or move a file), or may take othersuitable actions. Device 10 may, if desired, take certain actionsautomatically. For example, device 10 may automatically scroll contentaround display 12 as described in connection with FIG. 20 in response todetection of a vertical device orientation of the type shown in FIG. 20(i.e., an orientation in which rotational axis 94 is vertical withrespect to the ground).

The foregoing is merely illustrative of the principles of this inventionand various modifications can be made by those skilled in the artwithout departing from the scope and spirit of the invention.

What is claimed is:
 1. An electronic device, comprising: a hollow curvedcrystalline display cover structure having a curved interior surfacethat wraps continuously around a cavity, wherein the hollow curvedcrystalline display cover structure comprises a single-crystal inorganicmaterial; and a flexible display layer that conforms to the curvedinterior surface of the hollow curved crystalline display coverstructure and that surrounds the cavity.
 2. The electronic devicedefined in claim 1 wherein the single-crystal inorganic materialcomprises sapphire.
 3. The electronic device defined in claim 2 furthercomprising end cap structures on opposing ends of the hollow curvedcrystalline display cover structure, wherein the end cap structures havea first diameter and wherein the hollow curved crystalline display coverstructure has a second diameter that is less than the first diameter. 4.The electronic device defined in claim 2 wherein the hollow curvedcrystalline display cover structure comprises a hollow cylinder.
 5. Theelectronic device defined in claim 1 further comprising a supportstructure, wherein the flexible display layer has opposing edges andwherein the flexible display layer is configured to wrap around thecurved interior surface so that the edges protrude through an opening inthe support structure along a seam.
 6. The electronic device defined inclaim 1 wherein the flexible display layer has opposing edges andwherein the flexible display layer is configured to wrap around thecurved interior surface so that the opposing edges abut one anotherwithout overlapping.
 7. An electronic device, comprising: a hollowtransparent display cover structure having a longitudinal axis and aninterior surface that surrounds the longitudinal axis; a flexibledisplay layer that is wrapped around the longitudinal axis to cover theinterior surface of the hollow transparent display cover structure; anopaque masking layer interposed between the hollow transparent displaycover structure and the flexible display layer, wherein the opaquemasking layer extends parallel to the longitudinal axis; a sensor; andcontrol circuitry that is configured to display content on the flexibledisplay layer based on data from the sensor.
 8. The electronic devicedefined in claim 7 wherein the sensor comprises an accelerometer andwherein the control circuitry is configured to display the content onthe flexible display layer based on data from the accelerometer.
 9. Theelectronic device defined in claim 8 wherein the control circuitry isconfigured to scroll the content on the flexible display layer based onthe data from the accelerometer.
 10. The electronic device defined inclaim 8 wherein the control circuitry is configured to flip pages of thecontent on the display based on the data from the accelerometer.
 11. Theelectronic device defined in claim 7 further comprising end capstructures on opposing ends of the hollow transparent display coverstructure, wherein the control circuitry is configured to continuouslyscroll content on the display around the longitudinal axis in responseto detection with the sensor that the electronic device is resting onone of the end cap structures so that the longitudinal axis is vertical.12. The electronic device defined in claim 7 wherein the hollowtransparent display cover structure comprises a hollow sapphirestructure.
 13. The electronic device defined in claim 7 wherein thehollow transparent display cover structure has opposing ends and whereinthe electronic device further comprises circumferential end bands of theopaque masking layer formed on inner surfaces of the hollow transparentdisplay cover structure at each of the opposing ends.
 14. A method ofoperating an electronic device having a hollow transparent display coverstructure that is configured to be rotated about an axis by a user,having a flexible display layer that is wrapped around the axis to coveran interior surface of the hollow transparent display cover structure,and having control circuitry, the method comprising: with the controlcircuitry, gathering sensor data indicative of a rate of rotation of theelectronic device about the axis; and changing content that is displayedon the flexible display layer based on the rate of rotation of theelectronic device about the axis.
 15. The method defined in claim 14wherein the sensor comprises an accelerometer and wherein gathering thesensor data comprises gathering tilt data indicative of a tilt angle forthe electronic device.
 16. The method defined in claim 15 whereinchanging the content comprises adjusting a scroll speed on the flexibledisplay layer based on the tilt angle.
 17. The method defined in claim15 wherein changing the content comprises flipping pages of text basedon the tilt angle.
 18. The method defined in claim 14 wherein the sensoris configured to measure rotational motion of the electronic device andthe flexible display layer about the axis and wherein changing thecontent comprises displaying some content at a stationary position withrespect to the user while simultaneously displaying other content at astationary position with respect to the flexible display layer.
 19. Themethod defined in claim 14 wherein the sensor is configured to measurerotational motion of the electronic device and the flexible displaylayer about the axis and wherein changing the content comprises updatingtext on the display in response to rotation of the electronic device bythe user.
 20. The method defined in claim 14 further comprising a touchsensor, wherein the electronic device has a front face and a rear faceand wherein the control circuitry is configured to display content onthe front face based on touch input gathered using the touch sensor onthe rear face.
 21. The method defined in claim 14 wherein the hollowtransparent display cover structure comprises sapphire and wherein thesensor is configured to display scrolling text on the flexible displaylayer in response to rotation of the hollow transparent display coverstructure.